Emergency alerts for non-terrestrial network based user equipments

Abstract

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may transmit, via a non-terrestrial network (NTN), a request to register for emergency alerts. The UE may receive, via the NTN and based at least in part on the request, an emergency alert message and a reference location associated with the emergency alert message. The UE may provide the emergency alert message for display based at least in part on a current location associated with the UE being within a threshold distance from the reference location. Numerous other aspects are described.

What is claimed is: 
     
         1 . An apparatus for wireless communication at a user equipment (UE), comprising:
 one or more memories; and   one or more processors, coupled to the one or more memories, configured to cause the UE to:
 transmit, via a non-terrestrial network (NTN), a request to register for emergency alerts; 
 receive, via the NTN and based at least in part on the request, an emergency alert message and a reference location associated with the emergency alert message; and 
 provide the emergency alert message for display based at least in part on a current location associated with the UE being within a threshold distance from the reference location. 
   
     
     
         2 . The apparatus of  claim 1 , wherein, to receive the emergency alert message, the one or more processors are further configured to cause the UE to:
 receive the emergency alert message by a system information block (SIB) module of the UE or a radio resource control (RRC) layer of the UE.   
     
     
         3 . The apparatus of  claim 1 , wherein the one or more processors are further configured to cause the UE to:
 discard the emergency alert message based at least in part on the current location not being within the threshold distance from the reference location.   
     
     
         4 . The apparatus of  claim 1 , wherein the one or more processors are further configured to cause the UE to:
 determine the current location associated with the UE; and   compare the current location associated with the UE and the reference location, wherein the emergency alert message is displayed or discarded depending on the comparison.   
     
     
         5 . The apparatus of  claim 1 , wherein the emergency alert message is delivered based at least in part on NTN short message service (SMS) over non-access stratum (NAS) signaling, and the emergency alert message is processed using an SMS layer of the UE. 
     
     
         6 . The apparatus of  claim 1 , wherein the request indicates a global navigation satellite system (GNSS) location associated with the UE, and the UE is registered to receive emergency alert messages for a geographical area that includes the GNSS location of the UE. 
     
     
         7 . The apparatus of  claim 1 , wherein the emergency alert message is an earthquake and tsunami warning system (ETWS) alert message or a commercial mobile alert system (CMAS) alert message. 
     
     
         8 . The apparatus of  claim 1 , wherein the UE is an NTN narrowband Internet of Things (NB-IoT) equipped UE, and the UE is camped on an NTN NB-IoT cell. 
     
     
         9 . An apparatus for wireless communication at a network node, comprising:
 one or more memories; and   one or more processors, coupled to the one or more memories, configured to cause the network node to:
 receive, via a non-terrestrial network (NTN), a request to register for emergency alerts, wherein the request indicates a global navigation satellite system (GNSS) location associated with a user equipment (UE); and 
 transmit, via the NTN and based at least in part on the request, an emergency alert message and a reference location associated with the emergency alert message. 
   
     
     
         10 . The apparatus of  claim 9 , wherein the one or more processors are further configured to cause the network node to:
 register the UE to receive emergency alert messages for a geographical area that includes the GNSS location of the UE.   
     
     
         11 . The apparatus of  claim 9 , wherein the emergency alert message is kept based at least in part on a current location associated with the UE being within a threshold distance from the reference location. 
     
     
         12 . The apparatus of  claim 9 , wherein the emergency alert message is discarded based at least in part on a current location associated with the UE being within a threshold distance from the reference location. 
     
     
         13 . The apparatus of  claim 9 , wherein the emergency alert message is delivered based at least in part on NTN short message service (SMS) over non-access stratum (NAS) signaling. 
     
     
         14 . The apparatus of  claim 9 , wherein the emergency alert message is an earthquake and tsunami warning system (ETWS) alert message or a commercial mobile alert system (CMAS) alert message. 
     
     
         15 . The apparatus of  claim 9 , wherein the UE is an NTN narrowband Internet of Things (NB-IoT) equipped UE, and the UE is camped on an NTN NB-IoT cell. 
     
     
         16 . A method of wireless communication performed by a user equipment (UE), comprising:
 transmitting, via a non-terrestrial network (NTN), a request to register for emergency alerts;   receiving, via the NTN and based at least in part on the request, an emergency alert message and a reference location associated with the emergency alert message; and   providing the emergency alert message for display based at least in part on a current location associated with the UE being within a threshold distance from the reference location.   
     
     
         17 . The method of  claim 16 , wherein receiving the emergency alert message further comprises:
 receiving the emergency alert message by a system information block (SIB) module of the UE or a radio resource control (RRC) layer of the UE.   
     
     
         18 . The method of  claim 16 , further comprising:
 discarding the emergency alert message based at least in part on the current location not being within the threshold distance from the reference location.   
     
     
         19 . The method of  claim 16 , further comprising:
 determining the current location associated with the UE; and   comparing the current location associated with the UE and the reference location, wherein the emergency alert message is displayed or discarded depending on the comparison.   
     
     
         20 . The method of  claim 16 , wherein:
 the emergency alert message is delivered based at least in part on NTN short message service (SMS) over non-access stratum (NAS) signaling, and the emergency alert message is processed using an SMS layer of the UE; or   the request indicates a global navigation satellite system (GNSS) location associated with the UE, and the UE is registered to receive emergency alert messages for a geographical area that includes the GNSS location of the UE.